Richard Suchenwirth 2003-04-21 - This little Tk game features a snake that creeps around its place, eating fruit where available and growing from it, while touching itself or eating poison mean sure death.

escargo 22 Apr 2003 - Note that hitting a cursor key that makes you go backward counts as hitting yourself and is instantly fatal. - RS: Thanks for testing and reporting! The added line marked (1) above changes the behavior to more intuitive: the snake stops when directed backward, and moves on when you hit another arrow key. An alternative to the [Pause] button.

escargo 23 Apr 2003 - It occurred to me that snake-relative navigation would require only two cursor keys, left and right since you can't reasonably go backward and you are going forward by default. There are probably at least two mental styles of navigation, either absolute, where the keys indicate absolute direction (or direction relative to the playing field), and snake-relative, where the keys indicate a relative change in direction. Pressing the left arrow key multiple times in absolute navigation would make you turn left at most once. In snake-relative navigation, pressing the left arrow key multiple times would make you do counterclockwise circles or spirals.

I don't know what other snake games do, but it might be interesting to see how different modes of navigation affect play.